Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 49: Poster: Surfaces, Interfaces, Thin Films, Nanostructures

CPP 49.15: Poster

Mittwoch, 22. März 2017, 18:30–21:00, P2-OG1

Utilizing Confocal Active Interference Scattering Microscopy to directly measure the phase of light scattered by a single nanoparticle — •Otto Hauler, Frank Wackenhut, Kai Braun, and Alfred J. Meixner — Institute of Physical and Theoretical Chemistry, Tübingen, Germany

In the recent years the optical properties of noble metal nanoparticles of different shapes and sizes have been widely studied and exploited by nanotechnology based assays. Especially gold nanoparticles are promising candidates for various applications due to their outstanding optical properties, which are dictated by their particle plasmons [1-4]. A powerful tool to investigate single gold nanoparticles is confocal scattering microscopy combined with higher order laser modes. We extended this established method in a way that allows us to directly measure the phase of the scattered light by introducing an interferometrical detection scheme similar to a Michelson interferometer. This enables us to measure the phase and amplitude of the light scattered by single gold nanoparticles and will enhance the usefulness of this imaging technique. [1] Frank Wackenhut, Antonio Virgilio Failla, Tina Züchner, Mathias Steiner, and Alfred J. Meixner, Applied Physics Letters 100 (26), 263102 (2012). [2] Frank Wackenhut, Antonio Virgilio Failla, and Alfred J. Meixner, The Journal of Physical Chemistry C 117 (34), 17870 (2013). [3] Frank Wackenhut, Antonio Virgilio Failla, and Alfred J. Meixner, Phys. Chem. Chem. Phys. 15 (15), 5407 (2013). [4] Frank Wackenhut, AntonioVirgilio Failla, and AlfredJ Meixner, Anal Bioanal Chem 407 (14), 4029 (2015).